<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>firstApp</title>
    <script src="js/angular.js"></script>
    <style>
        .c{
            width:300px;
            height: 300px;
            border: 1px solid red;
        }
    </style>

</head>
<body ng-app>
<input type="text" ng-model='txt'/> <br/>
<div class="c">{{txt}}</div>

</body>
<script>

</script>
</html>